Pump



March 24, 1936." I L; E V. HENRY 'A v l PUMP Y' Filed sept.- 20, 1934 4"s1yeers-sheet 'i Lows EUGNE VlcToR Jo'sEPHHENRY malacfhi; l Afm/kfw Mmh 24, 1936.

L. E.' V. J. HENRY PUMP 4 She'ets-Sheet Filed sept. 20, 1934 www# March 24, 1936. E. v. J. l-SIENRY PUMP Filed sept. 2o, 1934 4 svneet-sheet 3 @las 12 19 l /WVTR u Louis `EUGENIE VICTOR JosEPH HENRY y,

Patented Mar. 24, 1936 PUMP" Louis Emile victoruosephnenry", yL

I.evzallois-lerret, France .y Application September 20, 1934,-Serla`l No. '144,843

In Luxemburgseptember 25, 1933 s claims. (ci. 10a-4149i The present 'inventionrelates in general to a device for pumpinguids, semi-iluids, and syr-y upy, pulverous or other substances, and more particularly hasreference to a pumping device- 5 including a tube made of elastic material which.`

' is successively deformed under the action of a suitable member and allowed to returnuto its original form as a result oi its elasticity.

In a preferred form of the present invention,

more particularly adapted to the transfusionoi blood or vother medical or surgical operations, the pumping mechanism is mounted upon -a base forming a casing provided with a removable bottom, intended to contain the accessories utilized in the operation of the device, so that they will be always within reach of the operator. u Another characteristic of the device consists in the use of a single wide roller of large diameter. which acts upon a loop of the tube, positioned in a. suitable casing. The free ends of the said tube,l are connected 4to suction and compressionv conduits, respectively. Due to this particular arrangement, a chamber oi' large volume is obtained, and all churning of the blood or of other substance passing through the tube is avoided, the deformation of the tube being produced progressively over a long section thereof. r

A third characteristic of this device -resides in thecontrol of the single roller mentioned above, by means of a crank or other suitable member for revolving it indifferently in both directions, or inl one direction only, this latter possibility preventing all false movements, which is extremely-importantin the case of blood transfusion.

The said control member is, besides. combined with a hodometer to measure the output oi the pump in direct relation to the number Aof revolutions of the rotor which supports the roller.

The device also includes means associated with the single roller mentioned above to vary the spacing of the rollerfrom the side of the casing which serves-as a bearing surface for the deiormation ofthe tube, so as to'permit the use of tubes of various sections.

Another feature of the present invention resides in the fact that the casing containing the mechanism has amovable part,vcombined with a play compensating device, which permits, when it is separated and drawn apart from the ilxed part, the tube to be veasily placed in position without having to touch its ends, or to bring them into contact with any part of the apparatus. As a consequence these ends are not exposed to the risk of being soiled or contaminated and the apparatusl may `be utilized" without any previous aseptic treatment. l H i The accompanying drawings illustrate, by way oi example, one form ofy the invention.

-Figure lisa perspective view ofthe appara-' 5; tus, the cover being removed and the parts of the' apparatusjbeing separated to permit placing th elastictube in position. Figure y2 is al view cl'tvrrespondin,r toFigure 1,'

but with the tube shown in its working position 10v and the` device ready toV operate.` y Figure 3'isa plan view seen Vfrom above the apparatus, with a parttorn awayg'to-show the de vice which ensures the irreversibility of the control member.`r l i 16" Figure 4 is a sectional view `along line A-B 'of Figureii. Figure 5 is a plan-viewseen from "above rthe apparatus, the mechanism actingon thetube L being removed. w .V20 Figure 6 is a side elevationlshowing the appa'-v ratus in working position. i Figure 'l is a view correspondingto Figurev 6, but with the hand crank turned upside down. '-1

Figure 8v is a detailed view showing the parts yof 25' the casing, separated to-permit'placing the elastic tube in position. y 'I'he apparatus of the present invention vis mounted-on a hollow base I provided with a `re movable bottom 2 which serves as a-receptacle 30 for the accessories requiredforuse ofthe-appa# rams. Y Mounted on base is a block 3 provided with a-cylindrical chamber 3 which serves as the casing of the pumping mechanism.V `It wm be noted 35 that an opening 2lil is formed in one side o1' block 3 providing access tothe chamber 3^ and that this same side of the block 3 is provided with grooves 22 and 24 and two smalli'urrows' Il. The purpose of theopening 20 and groovesfwill 40 be described hereinafter.r -f

Asvs'nown in Fig. 4, 'a shaft l[is supportedby block3 coaxially of the chamber' 3. VA"lll hub lis freely rotatably mounted on shaftlfand is integral with a plate 6 which revolvesin thecircu-y 45 lar space confined by the shoulder 'l formed in the lower portion of thechamber 3. The upper v portion offhub 5 isformed to provide a boss Il. A pair of spaced lugs 8 are, formed on the uppery surface yof boss Il and carry I a pin 9 on which one end of crank arm I 0 is pivoted.A i As lshown in Fig. 4, boss I I extendsto one side and cooperates with plate 6 towsupportaxle I2. v parallel toshaft 4. v"I'he portion ofaxlel I 2ex' v tending between plate 6 and bossl I'about which 55 roller I3 revolves, is eccentric relative to the porin such a way as to permit an accurate-adjusttions extending through plate 8 and boss II. With this construction, the distance between the axis of-roller I 3 and the cylindrical wall of chamber 3' can be kvaried by rotating axle I2. For

this purpose a pinion 38 is affixed on the upper end of axle I2 and is rotated to desired positions by a cooperating worm 35 mounted in boss II.

(Figs. 1, 2 and 3), having longitudinal holes for receiving two rods I8 and I1 carried by a sliding` block I8. The latter is hollowed out to receive' bosses I4 and I5 and a hodometer 21. One side,

of block I8 is recessed in the form ofv a portion of a cylinder I8 adapted, as shall beexplained further on, to close opening 2li. Block` I8 is pro-4 vided with two grooves 2| and 23, aswell as twovr pulled away from, block 3, its guiding beingen-V sured by rods'IB andk I1, which slidein bosses I4 and I5. Displacements of block I8 are obtained` by means of a double lever 28, mounted to pivot inv25, on block I8. Y

l.lis shown in Fig. 3, each of the extremities of the double 1ever 2s 1s secured to a ,stub shaft n by means of -screw 25. Each -shaft, 4,1,has an eccentric pin 48 on the free end thereof loosely positioned in a groove 48, provided in the` bossesl I4 and I5 of block. It can be conceived, therefore, that when double lever 25 is swung from the closed position las shown in Figures-2 and 6, to its opened position as shown in Figures land 8, pins 48 cause slidingv block I8 to slide inthe direction of arrow f. l f

`By reversing the movement of double lever 28, sliding block I8 Vis drawn close to block3 luntil part I8, mentioned above, adapts itself to opening andthus completesthe periphery ofcasing 3' which, thence, has the shape of ya complete cylinder. In this position, grooves 2|,-22, and `23--24, are broughtagainst each other thus forming two cylindrical channels intended to receive the elastic tube (Figures 2, 6 and '1) It is to be noted that these channels are located at two diierent levels. Y

lIt maybe noted, also, that` in order to permit the settingin height of the double lever 28, so

that it may. not project above the upper plane of blocks 3 and I8, shafts 41, upon which the ends of this double lever are clamped, are engaged in long holes provided for them in the ends of the said double lever.

Underthese conditions, after blocks3 and I 8 have been adjusted, the doublelever is clamped fast in its correct position by means of screws 25 which are screwed in shafts 41. On the other hand,i n order that, when the double lever 28 is in its closed position, slidingV block I8, may be exactly appliedwithout any play` against block 3, an adjusting device has been provided to take up the play that may` result from wear of shaft 41 and pin 48 or of their bearing points. This device comprises a bearingSII (Figures 3 and 7)' mounted to lt easily in a recess provided in block I8 -and having a hole to receive axle 25, eccentricallyprovided therein as shown'in Fig. 7. 'I'he outside of the bearing is provided with teeth which mesh with a worm 5I, which can be controlled from outside and which cooperates with a thrust block 52; By acting upon worms 5I, it is possibleto displace the shafts 41 and pins 48 ment of block I8 against block3.

'I'he apparatus above described is utilized in the following manner:

To put in place the elastic tube 28, which is provided with circular rings 82 and 33, double lever 28 is swung backward to the position indicated g y v on Figure 1. y 'I'he swinging of the lever causes the Block 3 is providedawith two bosses I4 and I5 sudingior bioekls in the'directionbf WOW f' 'andthe spacing apart of blocks3 and l"I8, thus l creating between them a gap 3I To put tube 28 j 20; above mentioned, by means of crank I0, so as to occupy the position shown in Figure 3. In this position, there exist, on either side of the said roller', entirely free passages 53 and 54. "Tube 28 is placed in empty space 3I with its ring 33 set in furrow- 34.andafter having been passed through passage 58, it is formed into a loop 55 (Figure 1) of the same diameter as casing 3' /which contains it. Itis then made to passthrough'pasSa-Ge 54, andv led voutfof the apparatus through thegfree part of empty space 3 I, ring- 32 being at the same` time engaged Vin thecorresponding furrow 34'..

Double lever 25 is then swung forward to its closed position thus drawing together-blocks `I8-and 3, and enclosing partsof tube 28 inthe channels formed by grooves 2I and 22, and 23-24 '(Flgures 2, 6 and 7) v 4 kBy acting upon crank -I0,roller I8-isA displaced along thelength of loop 55 v which it deforms against the sides ofcasing 3'. .This deformation produces compression of the fluid in the portion of the tube toward which the roller advances, and

thetendency of the tube to assumeits originalformk creates a suction in the portion thereof over which theroller has passed, Y, c v Y As shown in Fig. 4, the lower portion of plate 8` carries an eccentric 28' which has aconnecting rod 28; associated therewith forV actuating-'the hodometerg21. At eachvrevoiution of crank I0, the hodometer receives an impulse through connection' 28-28 and, as explained above, provides.

describedhereinbefore,.for adjustingthe spacing l,

of roller I3 from the wall o f chamber 3'. A screw driver 31 yfor making the adjustment may be received in a suitablesocket, asindioateduin the drawings. V l

.As described so far, the apparatus is reversible and inrv order rto make it Airreversiblea blocking system, suchaas that shown in ldetail in Figure-3,`

is .preferably utilized. k'Ihis device consists essenof plate 8,' and this plate may b e made to revolve freely injeither direction (left or right), no brak-'- ing action being exercised upon, it. To permit rotation in a single direction only, for example from leftto right, it vis necessary to bring ball 38 into contact with plate 8. For this purpose,'the back of' piston 40 (s acted upon by means of a cam 48, controlled from the outside by means of a knob 45.

In Figure 3, the ball is shown in braking position on plate 6, cam 46 being without action on piston 40. To bring the said ball into neutral position, it is sufiicient to make the cam revolve by means of milled knob 45, so that this cam pushes piston 40 and, consequently, bail 38 which ceases to be in contact with plate 6. Cam 46 is combined with a device which ensures its locking in its two extreme positions. An index rigid with knob 45, indicates these two positions. f

I claim as my invention:-

1. A pump of the character described, comprising a block having a cylindrical chamber formed therein and a lateral opening in one wall providing access to said chamber, a second block mounted for sliding movement toward and away from the side of said first-mentioned block provided with an opening, a resilient tube having a loop, the cooperating sides of said blocks having grooves formed therein operable when said blocks abut each other for supporting the loop of the resilient tube in said chamber with the tube against the inner wail thereof and the free ends of the tube projecting through said lateral opening, means in said chamber for pressing the resilient tube against the wall of the chamber, and means for moving the pressing means along the wall and tube to create a flow through said tube.

2. An apparatus for transfusion of blood, comprising an elastic tube, a fixed casing and a. part removable from the fixed part for positioning the elastic tube therebetween and in said casing, means for taking up the play between the movable and fixed parts of said casing, a roller for deforming the tube, and means `for moving saidv roller along the tube positioned in said casing to create a flow through the tube.

3. An apparatus for transfusion of blood, comprising an elastic tube, a fixed casing and a part removable from the xed part for positioning the elastic tube therebetween and in `said casing,

means for taking up the play between the movable and xed parts of said casing, a roller for deforming the tube, means for moving said roller along the tube positioned in said casing to create a flow through the tube, means for preventing reversal of the roller moving means consisting of a conduit provided in said casing, .two pistons arranged in said conduit and a ball positioned in said conduit between said pistons, a disc associ- LOUIS EUGNE VICTOR JOSEPH HENRY. 

